ASCEND COMMUNICATIONS, INC.
===========================

   MULTIBAND PLUS T1/PRI

   Card Type        T1 CSU                                        
   Chip Set         Unidentified                                  
   I/O Options      AC power connector, power switch, serial      
                    port,                                         
                                                                  
                    T1 network interface via RJ-48 connector (2), 
                    Alarm relay terminal block, palmtop port via  
                    RJ-12 connector (2), data port via 44-pin     
                    connector (4)                                 
   Wiring Type      RJ-48 shielded twisted pair                   
   T1 Transfer Rate 1.544Mbps                                     
   T1 Protocol      AMI, B8ZS                                     
   Frame type       D4, ESF                                       
   Data Bus         External                                      

<gopher://bitreich.org/I/th99/t/A-B/54985-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |      Function       | Label |       Function       | Label |
   |---------------------+-------+----------------------+-------|
   | AC power connector  |  CN1  | 44-pin DTE port 3    |  CN7  |
   |---------------------+-------+----------------------+-------|
   | Serial port         |  CN2  | 44-pin DTE port 4    |  CN8  |
   |---------------------+-------+----------------------+-------|
   | 44-pin DTE port 1   |  CN3  | RJ-48 network        |  CN9  |
   |                     |       | interface - line 1   |       |
   |---------------------+-------+----------------------+-------|
   | RJ-12 palmtop       |  CN4  | RJ-48 network        | CN10  |
   | connector           |       | interface - line 2   |       |
   |---------------------+-------+----------------------+-------|
   | RJ-12 palmtop       |  CN5  | Alarm relay terminal | CN11  |
   | connector           |       | block                |       |
   |---------------------+-------+----------------------+-------|
   | 44-pin DTE port 2   |  CN6  | Power                |  SW1  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DIAGNOSTIC LED(S)                      |
   |------------------------------------------------------------|
   | LED |     Color      |  Status  |        Condition         |
   |-----+----------------+----------+--------------------------|
   | PW  |     Green      |    On    |       Power is on        |
   |-----+----------------+----------+--------------------------|
   | PW  |      Green     |   Off    |       Power is off       |
   |-----+----------------+----------+--------------------------|
   | ER  |       Red      |    On    |  Self test in progress   |
   |-----+----------------+----------+--------------------------|
   | ER  |       Red      | Blinking | Device is not functional |
   |     |                |          |  due to fault or error   |
   |-----+----------------+----------+--------------------------|
   | ER  |       Red      |   Off    |   Device is functional   |
   |-----+----------------+----------+--------------------------|
   | P1  |     Green      |    On    |   Channel 1 is active    |
   |-----+----------------+----------+--------------------------|
   | P1  |      Green     | Blinking |   CSU is in diagnostic   |
   |     |                |          |  mode. BERT, auto-BERT,  |
   |     |                |          |   remote loopback, or    |
   |     |                |          |  local loopback test in  |
   |     |                |          |         progress         |
   |-----+----------------+----------+--------------------------|
   | P1  |      Green     |   Off    |  Channel 1 is inactive   |
   |-----+----------------+----------+--------------------------|
   | P2  |     Green      |    On    |   Channel 2 is active    |
   |-----+----------------+----------+--------------------------|
   | P2  |      Green     | Blinking |   CSU is in diagnostic   |
   |     |                |          |  mode. BERT, auto-BERT,  |
   |     |                |          |   remote loopback, or    |
   |     |                |          |  local loopback test in  |
   |     |                |          |         progress         |
   |-----+----------------+----------+--------------------------|
   | P2  |      Green     |   Off    |  Channel 2 is inactive   |
   |-----+----------------+----------+--------------------------|
   | P3  |     Green      |    On    |   Channel 3 is active    |
   |-----+----------------+----------+--------------------------|
   | P3  |      Green     | Blinking |   CSU is in diagnostic   |
   |     |                |          |  mode. BERT, auto-BERT,  |
   |     |                |          |   remote loopback, or    |
   |     |                |          |  local loopback test in  |
   |     |                |          |         progress         |
   |-----+----------------+----------+--------------------------|
   | P3  |      Green     |   Off    |  Channel 3 is inactive   |
   |-----+----------------+----------+--------------------------|
   | P4  |     Green      |    On    |   Channel 4 is active    |
   |-----+----------------+----------+--------------------------|
   | P4  |      Green     | Blinking |   CSU is in diagnostic   |
   |     |                |          |  mode. BERT, auto-BERT,  |
   |     |                |          |   remote loopback, or    |
   |     |                |          |  local loopback test in  |
   |     |                |          |         progress         |
   |-----+----------------+----------+--------------------------|
   | P4  |      Green     |   Off    |  Channel 4 is inactive   |
   |-----+----------------+----------+--------------------------|
   | LS1 |       Red      |    On    | Loss of synchronization  |
   |     |                |          | detected on network line |
   |     |                |          |            1             |
   |-----+----------------+----------+--------------------------|
   | LS1 |       Red      |   Off    | Loss of synchronization  |
   |     |                |          | not detected on network  |
   |     |                |          |          line 1          |
   |-----+----------------+----------+--------------------------|
   | RA1 |       Red      |    On    | Improper receive signal  |
   |     |                |          | or no signal detected on |
   |     |                |          |      network line 1      |
   |-----+----------------+----------+--------------------------|
   | RA1 |       Red      |   Off    | Improper receive signal  |
   |     |                |          | or no signal detected on |
   |     |                |          |      network line 1      |
   |-----+----------------+----------+--------------------------|
   | 1S1 |      Yellow    |    On    |   Blue alarm condition   |
   |     |                |          | detected. All ones (AIS) |
   |     |                |          |  received from network   |
   |-----+----------------+----------+--------------------------|
   | 1S1 |      Yellow    |   Off    | Blue alarm condition not |
   |     |                |          | detected on network line |
   |     |                |          |            1             |
   |-----+----------------+----------+--------------------------|
   | RL1 |      Yellow    |    On    |     Device in line 1     |
   |     |                |          | loopback diagnostic mode |
   |-----+----------------+----------+--------------------------|
   | RL1 |      Yellow    |   Off    |   Device not in line 1   |
   |     |                |          | loopback diagnostic mode |
   |-----+----------------+----------+--------------------------|
   | LL1 |   Unidentified |   Off    |         Not used         |
   |-----+----------------+----------+--------------------------|
   | LA1 |      Green     |    On    | Link is active on line 1 |
   |-----+----------------+----------+--------------------------|
   | LA1 |      Green     | Blinking |     Device unable to     |
   |     |                |          |     establish line 1     |
   |     |                |          | communications, possible |
   |     |                |          |   configuration error    |
   |-----+----------------+----------+--------------------------|
   | LA1 |      Green     |   Off    |     Link is inactive     |
   |-----+----------------+----------+--------------------------|
   | LS2 |       Red      |    On    | Loss of synchronization  |
   |     |                |          | detected on network line |
   |     |                |          |            2             |
   |-----+----------------+----------+--------------------------|
   | LS2 |       Red      |   Off    | Loss of synchronization  |
   |     |                |          | not detected on network  |
   |     |                |          |          line 2          |
   |-----+----------------+----------+--------------------------|
   | RA2 |       Red      |    On    | Improper receive signal  |
   |     |                |          | or no signal detected on |
   |     |                |          |      network line 2      |
   |-----+----------------+----------+--------------------------|
   | RA2 |       Red      |   Off    | Improper receive signal  |
   |     |                |          | or no signal detected on |
   |     |                |          |      network line 2      |
   |-----+----------------+----------+--------------------------|
   | 1S2 |      Yellow    |    On    |   Blue alarm condition   |
   |     |                |          | detected. All ones (AIS) |
   |     |                |          |  received from network   |
   |-----+----------------+----------+--------------------------|
   | 1S2 |      Yellow    |   Off    | Blue alarm condition not |
   |     |                |          | detected on network line |
   |     |                |          |            2             |
   |-----+----------------+----------+--------------------------|
   | RL2 |      Yellow    |    On    |     Device in line 2     |
   |     |                |          | loopback diagnostic mode |
   |-----+----------------+----------+--------------------------|
   | RL2 |      Yellow    |   Off    |   Device not in line 2   |
   |     |                |          | loopback diagnostic mode |
   |-----+----------------+----------+--------------------------|
   | LL2 |   Unidentified |   Off    |         Not used         |
   |-----+----------------+----------+--------------------------|
   | LA2 |      Green     |    On    | Link is active on line 2 |
   |-----+----------------+----------+--------------------------|
   | LA2 |      Green     | Blinking |     Device unable to     |
   |     |                |          |     establish line 2     |
   |     |                |          | communications, possible |
   |     |                |          |   configuration error    |
   |-----+----------------+----------+--------------------------|
   | LA2 |      Green     |   Off    | Link is inactive. Line 2 |
   |     |                |          |         disabled         |
   +------------------------------------------------------------+